# Operational data callback - getelem!

**URL:** <https://dmap-community.ductus.global/t/operational-data-callback-getelem/322>\
**Category:** CDB and CDB API\
**Created:** [December 17, 2015, 8:30am UTC](https://dmap-community.ductus.global/t/operational-data-callback-getelem/322 "2015-12-17T08:30:05Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![poornima11](https://avatars.discourse-cdn.com/v4/letter/p/dbc845/32.png) [@poornima11](https://dmap-community.ductus.global/u/poornima11)\
**Post date:** [December 17, 2015, 8:30am UTC](https://dmap-community.ductus.global/t/operational-data-callback-getelem/322/1 "2015-12-17T08:30:05Z")

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Hello Team,

I need to pass an argument to this get\_elem() calllback function. Is it possible?

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**Author:** ![greg](https://avatars.discourse-cdn.com/v4/letter/g/71c47a/32.png) [@greg](https://dmap-community.ductus.global/u/greg)\
**Post date:** [December 17, 2015, 9:51pm UTC](https://dmap-community.ductus.global/t/operational-data-callback-getelem/322/2 "2015-12-17T21:51:12Z")

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There is a t\_opaque field in struct confd\_trans\_ctx. You can look at examples.confd/intro/5-c\_stats/arpstat.c for an example of how this field could be used.

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**Author:** ![poornima11](https://avatars.discourse-cdn.com/v4/letter/p/dbc845/32.png) [@poornima11](https://dmap-community.ductus.global/u/poornima11)\
**Post date:** [December 18, 2015, 5:21am UTC](https://dmap-community.ductus.global/t/operational-data-callback-getelem/322/3 "2015-12-18T05:21:54Z")

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I shall do. Thanks a lot!